Better Torque From A 318

If talking low speed torque idle to 2500 rpms or so there's little to be gained over stock.
And torque to build hp at these rpms is pretty inefficient at 1313 hp is 25% of tq and 2626 rpm hp 50% of tq so it takes big changes in torque to make/loss hp.

Displacement number one, torque per cid operates in a relatively narrow range for mildish builds 1 -1.2 lbs-ft per cid. Torque is displacements and it's VE% and efficiency mainly CR.

The trick on a street performance engine is how much 3500-5500+ rpm tq/hp gain without overly negatively effecting under 2500 rpm, also a lighter car with deeper gears higher still more cr etc.. Moves the lowest rpms you have to worry about somewhat.

Below you can see at 3000 rpm would be over 50 lbs-ft over a complete stock 2bbl 318 with manifold's and add about 3-4% more with decent cr.
Modded Test don't go down to 2000/2500 rpm but obviously there probably still some decent gain over stock and it wasn't done by strangling the engine.

https://www.motortrend.com/how-to/mopp-0312-318-long-block-bolt-ons/

here the tq on a stock 2bbl 318 with headers Base

xe262h cam 4bbl added mod 1

spacer add mod 2